Abstract
In order to achieve the efficient dissociation of adsorption ions in ion-exchange resin,the desorption effect of NH sub(4) SCN desorption reagent on D296 resin containing Re was studied,and the optimal desorption technology was discussed. Through the static experiments,the desorption influence of desorption time,desorption temperature as well as the concentration and pH value of desorption solution on D296 resin was investigated,and the corresponding desorption curves were determined. The results showthat with adopting the NH sub(4) SCN desorption reagent,the optimal desorption temperature of D296 resin is 323 K,the optimal pH value is 10,and the optimal concentration of desorption solution is 100 g[middot]L super(-1). Under the condition of optimal desorption technology,the desorption rate of Re in D296 resin can be over 98% after the reaction for 20 min,and the desorption reaction is an endothermic reaction. When the flowing rate of NH sub(4) SCN desorption reagent is 2 mL[middot]min super(-1),the leaching effect is better.